Anṣuf ar Thunderbird n izegrar.
Rnu timahilin neɣ iɣunab nniḍen akken ad terreḍ Thunderbird d ayla-k.
Mdel
Markov Dictionary Switcher 1.0 Yesra asenker tikelt nniden
sγur Freek Zindel
Based on Dictionary Switcher but more than a thousand times faster and you can choose dictionaries that you want to use. Detects the language of the message that you are composing and changes the spelling dictionary.
Γef uzegrir agi
After changing the dictionaries to use in the extension options, you might need to restart Thunderbird to exclude all the other dictionaries from switching.